20011071431 has 8 divisors (see below), whose sum is σ = 21551537280. Its totient is φ = 18470770272.

The previous prime is 20011071407. The next prime is 20011071439. The reversal of 20011071431 is 13417011002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011071431 is a prime.

It is a super-2 number, since 2×20011071431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011071439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346325 + ... + 399953.

It is an arithmetic number, because the mean of its divisors is an integer number (2693942160).

Almost surely, 2^20011071431 is an apocalyptic number.

20011071431 is a deficient number, since it is larger than the sum of its proper divisors (1540465849).

20011071431 is a wasteful number, since it uses less digits than its factorization.

20011071431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82345.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 20011071431 its reverse (13417011002), we get a palindrome (33428082433).

The spelling of 20011071431 in words is "twenty billion, eleven million, seventy-one thousand, four hundred thirty-one".